Some aluminum are more difficult to machine than others. Very hard metals like brass and aluminum alloy, are easy to machine by general-purpose oils. Most often, these oils contain active sulfur and chlorine to protect the tooling and ensure good parts finish. For brass, aluminum, many carbon steels and low-alloy steels, a cutting oil with lubricity additives, friction modifiers and mild EP/anti-weld performance is sufficient, as aluminum and brass alloy does not require such high performance oils. These oils are generally formulated with sulfurized fat (inactive) and/or chlorinated paraffin. Oils formulated for brass and aluminum are often called "non-staining" oils.

*Contact KYOWA for further information.